JPH0443206A - Gasification device of liquid fuel gasification type combustion device - Google Patents

Abstract

PURPOSE:To improve an anti-tar performance while preventing a nozzle from being clogged with dropped particles of porous ceramic without requiring of slightly increasing the temperature of a gasification device by a method wherein the gasification element inwardly installed in a gasification chamber of a main body of a gasification device is made of porous ceramic and material having quality of a better heat conductivity than that of the porous ceramic. CONSTITUTION:A gasification device 5 of a liquid fuel gasification type combustion device is constructed such that a heat recovery part 52 is formed at an upper part of a main body of the gasification device, a nozzle 8 is disposed at a lower part of a gasification chamber 51 of a main body of the gasification device through a flow passage and further gasification elements 6 and 7 are installed in the gasification chamber 51. The gasification element 7 on an upstream side is made of porous ceramic and the gasification element 7 on the downstream side is made of a material having a better thermal conduction than that of the porous ceramic. Liquid fuel sent from the inlet port passes through the gasification element 6 and further passes through the gasification element 7. The gasification element 7 has a better heat conductivity, so that it shows a higher temperature than that of the gasification element 6. Accordingly, the gas gasified by the gasification element 6 having a poor heat conductivity and kept at a relatively low temperature is increased up to a desired temperature by the gasification element 7 and then the gas is supplied from the nozzle 8 to a burner 9.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a vaporizer for a liquid fuel vaporization type combustion device such as an oil fan heater.

<Prior art> Conventionally, in this type of vaporizer, a material such as porous ceramics is used as the vaporizing element installed in the vaporizing chamber.
Kerosene was evaporated and vaporized by keeping the temperature of the vaporization element at a high temperature of 250°C to 400°C and passing liquid fuel (kerosene) through the high temperature vaporization element.

Figure 2 (This shows the configuration of a liquid fuel vaporization type combustion device such as a wasted oil fan heater. In this configuration, the electromagnetic pump 1
Accordingly, the kerosene 3 in the fuel tank 2 is sent through the oil pipe 4 to the vaporization chamber 51 in the vaporizer 5, passes through the high-temperature vaporization element 6, is evaporated, and is supplied to the burner 9 through the nozzle/I/8. , is ignited by the ignition device 10 connected to the power source 11, and ? Start baking.

The fuel tank 2 is supplied with a cartridge tank 14 and V-fuel (kerosene) 3, and is always at a constant oil level.

The carburetor 5 recovers the heat of combustion in the burner 9 to warm the carburetor 5 and reduce power consumption of a heater for heating the carburetor externally attached to the carburetor main body. Further, a therminuta is provided to detect the temperature of the vaporizer 5, and a heater for heating the vaporizer is controlled.

The carburetor 5 is also provided with a solenoid valve 12 for controlling the opening and closing of the tip nozzle /L/8.
A relief pipe 13 is connected to the fuel tank 2 to release the liquid fuel in the vaporization chamber 51 when the fuel tank 2 is closed.

FIG. 3 shows the structure of a conventional carburetor. Vaporization element 6
is a cylindrical porous ceramic whose cross section is shown in FIG. The kerosene pumped by the electromagnetic pump 1 is diffused and absorbed into the high-temperature vaporizing element 6 and vaporized. The surface area in contact with the space of the vaporizing element 6 is large, and the vaporizing surface spreads over the entire vaporizing element 6, making effective use of the entire vaporizing element, making clogging with petroleum tar less likely.

<Problems to be Solved by the Invention> In the prior art described above, porous ceramic 7 is used as the vaporizing element 6, and the main body of the vaporizer 5 is made of metal.
When manufacturing and assembling the vaporizer 5, when inserting the vaporizing element 6 into the cylindrical hole that becomes the vaporizing chamber in the vaporizer main body, the inner diameter of the cylindrical hole in the vaporizer main body comes into contact with the outer diameter of the vaporizing element 6. , the porous ceramic particles fall off.

On the other hand, when the product is used (combusted), kerosene is vaporized by the high-temperature vaporizing element 6 and ejected from the tip nozzle 8 of the vaporizer 5. Therefore, the porous ceramic particles that fell off during production gradually moved toward the nozzle 8 and eventually clogged the pores of the nozzle 8.

Also, porous ceramics have poor thermal conductivity compared to metals. For this reason, when using a porous ceramic vaporizing element, compared to using a metallic vaporizing element, the Ganu temperature at which the kerosene is vaporized will be lower than the required value, causing problems such as macular burning. there were.

Therefore, it is necessary to raise the control temperature of the vaporizer somewhat,
There was also a problem in that the power consumption of the heater for heating the vaporizer also increased.

The present invention aims to solve the above-mentioned drawbacks and provide a vaporizer with excellent tar resistance.

Means for Solving the Problem> The problem solving means according to claim 1 is provided in a liquid fuel vaporization type combustion apparatus in which liquid fuel is vaporized in a vaporizer 5 and is injected through a nozzle 1L/8 and combusted as shown in FIG. A vaporizing element 6 made of porous ceramics and a vaporizing element 7 made of a material with better thermal conductivity are provided in the vaporizing chamber 51 of the vaporizer body.
It is equipped with a vaporizing element consisting of.

Further, the problem solving means according to claim 2 is, as shown in FIG.
The downstream part 7 of the vaporization element serves as a particle passage blocking filter means for the porous ceramic element.

Function> In the above problem solving means, the vaporizer 5 is connected to the oil pipe 4.
The liquid fuel (kerosene) sent into the inlet is dripped onto the surface of the vaporization element 6 made of porous ceramics,
It diffuses inside, is absorbed, and vaporizes. Further, since it has good thermal conductivity, it is heated in the vaporizing element 7, which has a higher temperature, and becomes a hotter body, and then is supplied to the burner 9 through the nozzle 1L/8 and burned.

Furthermore, even if the porous ceramic particles that have fallen off from the vaporization element 6 move downstream, they are blocked by the filter of the vaporization element 7, and the nozzle 8 (7) is prevented from being clogged.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. 1st
The figure is a sectional view of a main part of a vaporizer of a liquid fuel vaporization type combustion apparatus showing an embodiment of the present invention.

The overall configuration of the liquid fuel vaporization type combustion apparatus is almost the same as the conventional one shown in FIG. 2, and since the overall configuration was explained in the section of the prior art, the explanation thereof will be omitted.

Furthermore, except for the structure of the vaporization element, the other configurations are the same as those shown in FIG. 2, so components with the same functions as those shown in FIG. 2 are designated by the same reference numerals.

Further, please refer to FIG. 2 for components described in this embodiment that are not shown in FIG. 1.

As shown in the figure, the vaporizer 5 of the liquid fuel vaporization type combustion apparatus according to the present invention has a heat recovery section 52 formed in the upper part of the vaporizer main body, and a nozzle connected to the lower part of the vaporization chamber 51 of the vaporizer main body through a flow path. 8 is arranged, and the vaporizing elements 6 and 7 are installed inside the vaporizing chamber 51. The upstream vaporizing element 6 is made of porous ceramics and is formed into a cylindrical shape so that its surface area in contact with the space of the vaporizing chamber 51 is larger than its cross-sectional area. is a material with better thermal conductivity than porous ceramic elements, and has gas passage holes dense enough to prevent the passage of particles shed from the porous ceramic element.

For example, the wire outer diameter φ1. Omi! Cut J meter brass wire to a length of 1.0 mm! ] It is cut into pieces of about 1 meter and sintered and solidified to form a cylindrical shape.

When producing and assembling the vaporizer 5, the vaporizing element 6 is fitted and inserted into the cylindrical hole that becomes the vaporizing chamber in the vaporizer main body, and then the cylindrical hole is blown with air to remove fallen particles of the porous ceramic element.

Thereafter, the vaporization element 7 is fitted and inserted into the cylindrical hole.

Finally, the cap 53 is inserted into the cylindrical hole and sealed by brazing.

The length ratio of vaporizing elements 6 and 7 is about 8:2.

The upper end of the vaporizing element 6 is the vaporizing chamber 5 of the oil pipe 4.
It is located below the inlet to 1.

Further, a space 51 which becomes a part of the vaporization chamber is formed between the upper end of the vaporization element 6 and the top surface of the cylindrical hole of the vaporizer main body, that is, the earthen wall.

The vaporizing element 7 is located below the vaporizing element 6, and is connected to the nozzle v8 via a flow path near the lower end of the vaporizing element 7.

In the above configuration, the liquid fuel (kerosene) fed from the inlet is dripped onto the surface of the vaporizing element 6, vaporized by the vaporizer 6.7, and supplied to the divana 9 through the nozzle 8.

The upper part of the vaporization element 6 is a space 5! The vaporization element 6
Since it is cylindrical, the surface area in contact with the space 51 of the vaporizing element is large, and the dropped kerosene is diffused and absorbed by the entire vaporizing element 6 made of porous ceramics, and the vaporizing surface spreads over the entire vaporizing element 6, making the entire vaporizing element effective. Used to prevent clogging caused by petroleum tar.

Furthermore, since the vaporization element 6 is cylindrical, the inner surface has a relatively low temperature. Therefore, the location where tar is generated moves to the downstream part of the vaporizing element 6, and tar can be accumulated over the entire vaporizing element 6. Therefore, the tar resistance performance is improved by effectively using the volume of the vaporizing element 6. The kerosene vaporized gas that has passed through the vaporization element 6 further passes through the vaporization element 7.

The vaporizing element 7 is a sintered body of cut brass wire, and has good thermal conductivity, so the temperature is higher than that of the vaporizing element 6. Therefore, the vaporization element 6 has poor thermal conductivity and is at a slightly low temperature.
The vaporized gas is heated to a required temperature by the vaporization element 7 and then supplied to the burner 9 through the nozzle 8.

That is, while using cylindrical porous ceramics to improve tar resistance, there is no need to raise the vaporizer temperature. In addition, as the porous ceramic particles fall off from the vaporization element 6 and use (P firing) progresses,
Even if it moves to the downstream side of the vaporization chamber, the dense vaporization element 7 acts as a filter to prevent it from passing through, and the nozzle/L/8
This prevents the pores of the nozzle 8 from being clogged.

<Effects of the Invention> As is clear from the above explanation, according to the present invention, by using a vaporizing element made of porous ceramics, the tar resistance performance is improved, while the vaporizer temperature does not need to be increased to some extent. Furthermore, the nozzle is not clogged with fallen particles of porous ceramic particles, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a main part of a vaporizer of a liquid fuel vaporization type combustion apparatus showing an embodiment of the present invention, Fig. 2 is an overall configuration diagram of a liquid fuel vaporization type combustion apparatus, and Fig. 3 is a diagram of a conventional vaporizer. It is a sectional view of the main part. 1: Electromagnetic pump, 2: Fuel tank, 3: Kerosene,
4: Oil feed pipe, 5: Vaporizer, 51: Vaporization chamber (space L) 52: Heat recovery section, 53: Cap, 6: Vaporization element, 7 Divaporization element, 8: Nozzle, 9 Nipana, 1O: Ignition device. ll: Power supply, 12: Solenoid valve, 13: Relief pipe, 14: Cartridge tank. Agent: Patent attorney Ume 1) Masaru (and 2 others) 2nd Figure 3

Claims (1)

[Claims] 1. In a liquid fuel vaporization type combustion device in which liquid fuel is vaporized in a vaporizer and ejected from a nozzle for combustion, the vaporization element installed in the vaporization chamber of the vaporizer main body is made of porous ceramics. A vaporizer for a liquid fuel vaporization type combustion device consisting of an element made of a material with better thermal conductivity than porous ceramic. 2. The vaporization element has an upstream side made of the porous ceramic and a downstream side made of the above material with good thermal conductivity, and the downstream side is also used as filter means for preventing passage of fallen particles of the porous ceramic element. A vaporizer for the liquid fuel vaporization type combustion device described above.